private static ImplementedByExpression CombineIB(ImplementedByExpression a, ImplementedByExpression b, Type type, Func <Expression, Expression, Expression> combiner)
{
return(new ImplementedByExpression(type, a.Strategy,
a.Implementations.OuterJoinDictionaryCC(b.Implementations,
(t, ia, ib) => CombineEntity(ia ?? NullEntity(t), ib ?? NullEntity(t), t, combiner)
)));
}
protected internal virtual Expression VisitImplementedBy(ImplementedByExpression ib)
{
var implementations = Visit(ib.Implementations, v => (EntityExpression)Visit(v));
if (implementations != ib.Implementations)
{
return(new ImplementedByExpression(ib.Type, ib.Strategy, implementations));
}
return(ib);
}
internal override Expression GetExpression(Alias tableAlias, QueryBinder binder, Expression id)
{
var implementations = ImplementationColumns.SelectDictionary(t => t, (t, ic) =>
new EntityExpression(t, new PrimaryKeyExpression(new ColumnExpression(ic.Type.Nullify(), tableAlias, ic.Name)), null, null, null, AvoidExpandOnRetrieving));
var result = new ImplementedByExpression(IsLite ? Lite.Extract(FieldType) : FieldType, SplitStrategy, implementations);
if (this.IsLite)
{
return(binder.MakeLite(result, null));
}
else
{
return(result);
}
}
protected internal override Expression VisitImplementedBy(ImplementedByExpression rb)
{
return(rb.Implementations.Select(ee => new When(Visit(ee.Value.ExternalId).NotEqualsNulll(), Visit(ee.Value))).ToCondition(rb.Type));
}